Hall effect in the new diluted magnetic semiconductor p-CdSb:Ni

The anomalous contribution to the Hall effect is attributable to presence of magnetic Ni1–xSbx nanoclusters, which have been found previously from investigation of magnetic properties of p-CdSb:NiyesBelgorod State Universit

The influence of Ni-rich nanoclusters on the anisotropic magnetic properties of CdSb doped with Ni

The magnetic properties of oriented CdSb single crystals doped with 2 at% of Ni are investigatedyesBelgorod State Universit

Magnetoresistance and Anomalous Hall Effect of InSb Doped with Mn

Transport properties of polycrystalline (In, Mn)Sb samples are investigated. Behavior of the temperature and magnetic field dependencies of the resistivity, anomalous Hall coefficient and magnetoresistivity at low temperatures points out the influence of Mn complexes, Mn ions and nano- and microsizes MnSb precipitates on charge transport. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3361

Magnetic Properties of AIIBIVCV2 Compounds Doped with Mn

Mn-doped AIIBIVCV2 semiconductors bulk crystals were grown by direct melting of base components with fast cooling. Structural and magnetic properties of samples were investigated. Analysis of the temperature dependence of the magnetization reveals three types of magnetic species: the substitutional Mn ions making Mn complexes (especially dimers), the MnAs micro- and nanosize precepitates. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3361

Plasma rotation diagnostics at the FT-2 tokamak based on the upper hybrid resonance backscattering enhanced doppler effect

Observations of enhanced Doppler frequency shift effect of the highly localized microwave backscattering in the upper hybrid resonance are reported. The experiment is performed at FT-2 tokamak, where a steerable focusing antenna set, allowing off equatorial plane plasma extraordinary wave probing from high magnetic field side, was installed. A separate line less than 1.5 MHz wide and shifted by up to 2 MHz is routinely observed in the backscattering spectrum under condition of accessible upper hybrid resonance. The enhanced frequency shift is explained by the growth of poloidal wave number of the probing wave in the resonance. Development of a new scheme for local diagnostics of fluctuations poloidal rotation based on this effect is started.У статті описуються спостереження посиленого ефекту Доплера в спектрі сигналу розсіяного назад у верхньому гібридному резонансі зондувальної хвилі. Експеримент виконаний на токамаці ФТ-2, на якому недавно були встановлені рухливі антени, що дозволяють здійснювати зондування плазми електромагнітними хвилями в незвичайній поляризації з боку сильного магнітного поля. За умови доступного верхнього гібридного резонансу в спектрі розсіювання спостерігалася лінія шириною менш 1.5 МГц, зрушена до 2 МГц. Ефект пояснений ростом полоідального хвильового числа зондувальної хвилі в резонансі. Почато розвиток нової схеми локальної діагностики обертання плазмових флуктуацій, заснованої на цьому ефекті.В статье описываются наблюдения усиленного эффекта Доплера в спектре сигнала рассеянного назад в верхнем гибридном резонансе зондирующей волны. Эксперимент выполнен на токамаке ФТ-2, на котором недавно были установлены подвижные антенны, позволяющие осуществлять зондирование плазмы электромагнитными волнами в необыкновенной поляризации со стороны сильного магнитного поля. При условии доступного верхнего гибридного резонанса в спектре рассеяния наблюдалась линия шириной менее 1.5 МГц, сдвинутая до 2 МГц. Эффект объяснён ростом полоидального волнового числа зондирующей волны в резонансе. Начато развитие новой схемы локальной диагностики вращения плазменных флуктуаций, основанной на этом эффекте

Magnetotransport of indium antimonide doped with manganese

Magnetotransport, including the magnetoresistance (MR) and the Hall effect, isinvestigated in polycrystalline In1-xMnxSb samples with x = 0.02 – 0.06, containing nanosize MnSb precipitates. The relative MR, Δρ/ρ, is positive within the whole range of B= 0 – 10 T and T ~ 20 – 300 K. The Hall resistivity, ρH, exhibits a nonlinear dependence on B up to the room temperature.MR is interpreted with the two-band model, suggesting two types of holes with different concentration and mobility. In addition, analysis of ρH (B, T) is performed by taking into account both the normal and the anomalous contributions. The latter is attributable to the effect of MnSb nanoprecipitates, having the ferromagnetic Curie temperature well above 300 K

Hall effect in the new diluted magnetic semiconductor p-CdSb:Ni

yesThe anomalous contribution to the Hall effect is attributable to presence of magnetic Ni1–xSbx nanoclusters, which have been found previously from investigation of magnetic properties of p-CdSb:NiBelgorod State Universit

Magnetotransport of indium antimonide doped with manganese

Magnetotransport, including the magnetoresistance (MR) and the Hall effect, isinvestigated in polycrystalline In1-xMnxSb samples with x = 0.02 – 0.06, containing nanosize MnSb precipitates. The relative MR, Δρ/ρ, is positive within the whole range of B= 0 – 10 T and T ~ 20 – 300 K. The Hall resistivity, ρH, exhibits a nonlinear dependence on B up to the room temperature.MR is interpreted with the two-band model, suggesting two types of holes with different concentration and mobility. In addition, analysis of ρH (B, T) is performed by taking into account both the normal and the anomalous contributions. The latter is attributable to the effect of MnSb nanoprecipitates, having the ferromagnetic Curie temperature well above 300 K

Magnetic properties of carbon nanoparticles

Magnetization M (T, B) of powder and glassy samples containing carbon nanoparticles is investigated in the interval of temperatures T between ∼ 3 - 300 K and magnetic fields B up to 5 T. Low-field magnetization, M (T), exhibits a strong magnetic irreversibility, which is suppressed above the field of ∼ 1 T. The dependence of M (B) saturates at high temperatures above B ∼ 2 T, magnetic hysteresis is observed already at 300 K. The values of the saturation magnetization, the coercivity field and the maximum blocking temperature are obtained. Analysis of the experimental data gives evidence for concentration of the magnetization close to the surface of the particles, which is consistent with the origin of magnetism in nanocarbon presumably due to intrinsic disorder and surface defects. © Published under licence by IOP Publishing Ltd

The influence of Ni-rich nanoclusters on the anisotropic magnetic properties of CdSb doped with Ni

yesThe magnetic properties of oriented CdSb single crystals doped with 2 at% of Ni are investigatedBelgorod State Universit